Earth Hour 2013 is calling on everyone to turn out the lights this Saturday

For the second straight year, the World Wildlife Fund is promoting "Earth Hour," a call to people from all around the world to turn off their lights for one hour on the same night "to focus on the one thing that unites us all—our planet." The 2013 Earth Hour is scheduled for this Saturday night, from 8:30-9:30 p.m.

Pinellas County's Barb Howard and her husband have participated in Earth Hour for the past four years. She said it's not about the energy that people save in one hour, but increasing awareness about conservation.

"I'm really excited about this program because it brings climate change out in the open and urges people to protect our planet. When you see all the lights go out for an hour in big cities like Sydney, Australia, or Chicago, you know that people are starting to understand," Howard told CL in an email.

"We have taken steps to decrease our impact on the climate by putting solar panels on our house as well as buying an electric car, the Chevy Volt. There are rebates out there to make these things more affordable, and when you figure out how much you save each month in electric and gasoline, the price seems reasonable, all while we are helping with our footprint," she said.

You can get more information about Earth Hour here.